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(No Model.)

J. THOMPSON & A. WELLS.

BED BOTTOM FRAME.

No. 258,613. Patented Mahyso, 1882.

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JOHN A. THOMPSON AND ENEAS WELLS, OF PITTSBURG, PA.

BED-BOTTOM FRAME.

SPECIFICATION forming part of Letters Patent No. 258,613, dated May 30,1882.

Application filed April 10, 1882. (No model.)

To all whom it may concern:

Be it known that we, JOHN A. THOMPSON and ZENEAS WELLS, of Pittsburg, inthe county of Allegheny and State of Pennsylvania, have invented a newand useful Improvement in Bed-Bottom Frames; and we do hereby declarethe following to be a full, clear, and exact description thereof,reference being had to the accompanying drawings, forming a part of thisspecification, and in which- Figure 1 is a longitudinal section of ourimprovement in bed-bottoms. Fig.2is an inner side view of one of thecorner-pieces. Fig. 3 is a sectional view, showing the manner ofattaching the corner-pieces to the side rails. Fig. 4: is a view'showingthe cornerpiece and a tubular metallic end rail.

Like letters of reference indicate like parts in each.

Our invention relates to an improvementin the frames for woven-wiremattresses which form the subject of Letters Patent No. 239,129, grantedto us March 22, 1881; and it consists in an improved device foradjusting and fastening the side rails and corner-pieces in a fixedrelative position, as described and claimed.

We will now describe ourinvention, so that others. skilled in the artmay manu Factureand use the same.

In the drawings, (t represents the side rails of the frame, which aremade of iron or other metal, preferably, however, of gas-pipe or othertubing, which secures strength and lightness. These side rails aresecured to metal corner-pieces b, each of which is provided with twosockets, c and d, one for the side rail and the other for the end railof the frame, the two sockets being at right angles to each other, andthe socket 01 being preferably on a plane above the socket c for theside rail, so as to keep the wire mattress stretched above the siderails. The end rails, 6, may be formed of metal or of wood, as ispreferred, both of which forms are shown in the drawings. Both ends ofthe side rails, to, are provided with a screw-thread, and the sockets cof the cornerpieces I) are also threaded, so that by turning the siderails, a, the end rails, 6, will be moved farther apart or drawn nearerto each other, so as to stretch or slacken the wire fabiic.

To prevent the side rails from turning in the sockets 0 when the framereceives a jaror is lifted by one of the corner-pieces so as to throwthe entire weight upon the corner-pieces,

a set-screw, f, passes through a threaded hole, f, in the side of thesocket, so as to bite against the threaded portion of the side rails, a,as shown in Fig. 3.

The side rails, a, are provided with a hole, h, into which a rod or toolmay be inserted to turn the rails, and thereby lengthen or shorten theframe; but the rails, however, can be easily turned without this by theuseof any suitable pipe-wrench.

The end rails, e, may he formed ofwood and secured in the rectangularsockets d of the corner-pieces b, or they may be formed of gaspipe, asshown in Fig. 4, which fits in the sockets d, made of correspondingshape. The wire mattress is attached to the two end rails.

In case the mattress should become stretched and sag, it maybestraightened and hauled taut by turning the side rails, a, in thesockets c so as to move the end rails, c, farther apart from each other,the set-screw f being first loosened and then screwed in again after themattress has been straightened.

The advantages of our invention are that the side rails are securelyheld from turning in the sockets of the corner-pieces, the frame may beeasily and evenly adjusted and secured firmly in its adjusted position,no especial fitting is necessary to make the frame lie level, and it issecured against warping or racking.

- Having thus described our invention, what we claim, and desire tosecure by Letters Patent, is-

1. A woven-wire-mattress frame consisting of screw-threaded metallicside rails, threaded metallic corner-pieces, having sockets for the endand side rails, in combination with setscrews which pass through thecorner-pieces and bear against the threaded portion of the side rails,substantially as and for the purposes specified.

2. A mattress-frame having adjustable side rails, provided with a setscrew or screws extending through the sockets and biting on the railfitting therein, substantially as and for the purposes described.

In testimony whereof we have hereunto set our hands this 4th day ofApril, A. D. 1882.

JOHN A. THOMPSON. ZENEAS WELLS.

Witnesses:

T. B. KERR, JAMES H. Foam.

